Manual 4-jaw self-centering scroll chuck for synchronized four-jaw clamping.
4-Jaw Self-Centering Chuck
KORRETTO 4-Jaw Self-Centering Chuck is a manual chuck with synchronized four-jaw movement. As a self-centering scroll chuck, it is used for selected regular workpieces where four-point clamping and quick centering are required.
Product Overview
The 4-jaw self-centering chuck moves all four jaws together toward the center. This manual scroll chuck is selected when the workpiece geometry is suitable for synchronized four-jaw clamping and faster loading than an independent chuck.
Selection should confirm chuck size, mounting interface, workpiece shape, clamping range, required centering accuracy and machine compatibility.
Key Features
| Feature | Description |
|---|---|
| Synchronized four-jaw movement | Four jaws move together for quick centering. |
| Manual scroll chuck structure | The internal scroll mechanism supports synchronized four-jaw movement. |
| Manual lathe operation | Suitable for conventional turning setups. |
| Four-point clamping | Useful when the part geometry benefits from four jaws. |
| Faster than independent setup | Reduces individual jaw adjustment when self-centering is suitable. |
| Different from 4-jaw independent chucks | Not intended for separate jaw offset adjustment. |
Typical Applications
- Regular workpieces suited to four-jaw clamping
- Manual lathe workholding
- Repeated setup of compatible parts
- General turning operations
- Workpieces requiring synchronized four-point holding
- Chuck replacement for matching machines
Technical Data and Dimensions
Use the drawing and parameter table to check chuck size, mounting dimensions, clamping range, net weight and machine compatibility.
| Size D | D1 | D2 | D3 | H | H1 | h | z-d |
|---|---|---|---|---|---|---|---|
| 200A | 165 | 180 | 65 | 122 | 75 | 5 | 3-M10 |
| 240 | 195 | 215 | 70 | 120 | 80 | 8 | 3-M12 |
| 250 | 206 | 226 | 80 | 120 | 80 | 5 | 3-M12 |
| 250C | 206 | 226 | 80 | 130 | 80 | 5 | 3-M12 |
| 250A | 206 | 226 | 80 | 136 | 80 | 5 | 3-M12 |
| 325 / 325C | 272 | 296 | 100 | 153.5 / 154.5 | 97 | 12 | 3-M16 |
| 325A | 272 | 350 | 100 | 169.5 | 97 | 12 | 3-M16 |
| 380 / 380C | 325 | 350 | 145 | 155.5 / 156.5 | 102.5 | 6 | 3-M16 |
| 380A | 325 | 350 | 145 | 171.5 | 102.5 | 6 | 3-M16 |
| 500A | 440 | 465 | 210 | 202 | 115.4 | 6 | 3-M16 |
Related Manual Chuck Pages
FAQ
What is a 4-jaw self-centering chuck?
It is a manual chuck where all four jaws move together toward the center.
Is this also called a scroll chuck?
Yes. A self-centering chuck with an internal scroll mechanism can also be described as a scroll chuck.
How is it different from a 4-jaw independent chuck?
A self-centering chuck moves the jaws together. An independent chuck allows each jaw to be adjusted separately.
Can it be used for offset turning?
It is not the best choice for offset setup. A 4-jaw independent chuck is usually better for individual jaw adjustment.
What should be checked before ordering?
Check chuck size, mounting interface, workpiece shape, clamping range, centering accuracy and machine compatibility.
Is this a power chuck?
No. This is a manual self-centering chuck. Hydraulic and pneumatic chucks are separate product lines.